CN218782987U - Circuit breaker - Google Patents

Abstract

An embodiment of the present application provides a circuit breaker, includes: well lid, face lid and circuit board. Wherein, the middle cover is provided with a first groove and a second groove, and the depth of the second groove is larger than that of the first groove. The surface cover covers the middle cover, and a first cavity is formed between the surface cover and the middle cover. The circuit board holds in first cavity, and the one side of lid is equipped with first resistance module and second resistance module in the circuit board orientation, and first resistance module crouches in first recess, and second resistance module stands in the second recess, can make full use of the space of first cavity for circuit board layout mode in the circuit breaker is reasonable, and the reliability of circuit can improve.

Description

Circuit breaker

Technical Field

The embodiment of the application relates to a circuit protector technology, in particular to a circuit breaker.

Background

The common molded case circuit breaker has only short circuit and overload, does not have the leakage protection function, and the molded case circuit breaker with the residual current protection function is generally provided with a leakage release besides the short circuit and the overload so as to disconnect the connection between a power supply circuit and a load when the load has electric leakage.

In the prior art, due to the limitation of the space in the circuit breaker, a circuit board integrated with a piezoresistor and a voltage reduction resistor is mainly placed in the space between a base and a middle cover, a circuit board integrated with a circuit for controlling the related leakage protection is placed in the space between the middle cover and a surface cover, and then the two circuit boards are connected through a plurality of connectors or a plurality of leads.

However, this layout is not reasonable, which adds some wires and connectors to the circuit, which increases the cost of the components and assembly, and reduces the reliability of the circuit.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, embodiments of the present application provide a circuit breaker, which overcomes the above problems or at least partially solves the problems of unreasonable layout manner, high cost and low reliability of the circuit board.

The embodiment of the application provides a circuit breaker, include: well lid, face lid and circuit board. Wherein, the middle cover is provided with a first groove and a second groove, and the depth of the second groove is larger than that of the first groove. The surface cover covers the middle cover, and a first cavity is formed between the surface cover and the middle cover. The circuit board holds in first cavity, and the circuit board is equipped with first resistance module and second resistance module towards the one side of well lid, and first resistance module crouches in first recess, and second resistance module stands in the second recess.

In this embodiment, the first resistor module is horizontally placed in the first groove, and the second resistor module is vertically placed in the second groove, so that the space of the first cavity can be fully utilized, and the circuit board integrated with the first resistor module and the second resistor module is placed in the first cavity. So, can be with being used for controlling earth leakage protection's relevant circuit and resistance relevant circuit integrated to a circuit board in first cavity, compare in two circuit boards that prior art set up, the wire and the connector that this embodiment no longer need be used for connecting two circuit boards for circuit board layout mode in the circuit breaker is reasonable, and the reliability of circuit can improve.

In an optional mode, the circuit breaker further comprises a base and a power taking wire, the middle cover covers the base, and a second cavity is formed between the middle cover and the base. The base is provided with a first through hole, a second through hole and a wiring groove, the hole axes of the first through hole and the second through hole are perpendicular to the first surface, the first surface is a side surface of the base facing the middle cover, the wiring groove is formed in the second surface, and the second surface is the reverse side of the first surface. One end of the wire taking device is connected with the connecting plate of the circuit breaker, and the other end of the wire taking device penetrates through the first through hole from the second cavity body, is led out from the second through hole through the wiring groove and is connected with the circuit board.

In this embodiment, get the electric wire and draw forth the back from the second through-hole via the trough, be connected with the circuit board again, will get the electric wire and accomodate in the trough again and draw forth from the second through-hole and be connected with the circuit board like this, can make the interior line of walking of circuit breaker cleaner and tidier, the electric elements near the trough is less moreover, gets the electric wire and can reduce the interference of getting the electric elements in the electric wire to the circuit breaker via the trough, improves the reliability of circuit.

In an optional mode, the middle cover is provided with a third through hole, the third through hole and the second through hole are arranged oppositely, and the power taking wire is led out from the second through hole, penetrates through the second cavity and the third through hole and is connected with the circuit board.

In this embodiment, set up the third through-hole relative with the second through-hole on the well lid, get the electric wire and can directly be connected with the circuit board after passing through second through-hole, second cavity and third through-hole to reduce the length of getting the electric wire, reduce cost.

In an optional mode, a mutual inductor is further arranged on the base, the mutual inductor is accommodated in the second cavity, a fourth through hole is formed in the middle cover, the axis of the fourth through hole is perpendicular to the third surface, the third surface is the surface of one side, facing the surface cover, of the middle cover, the fourth through hole is opposite to the signal output end of the mutual inductor, and the signal output end is connected with the circuit board through the fourth through hole.

In this embodiment, the middle cover is provided with a fourth through hole opposite to the signal output end of the transformer, so that the signal output end can be conveniently connected with the circuit board.

In an alternative mode, the circuit breaker comprises a first connector, the circuit board is provided with a second connector, the signal output end is connected with the first connector, and the first connector penetrates through the fourth through hole to be connected with the second connector.

In an alternative mode, the second connector is arranged on one side surface of the circuit board close to the face cover, so that the first connector and the second connector are connected conveniently.

In this embodiment, considering that the space between the circuit board and the middle cover may not be enough to dispose the second connector, disposing the second connector on the side surface of the circuit board close to the face cover can facilitate the connection of the first connector and the second connector.

In an optional mode, the base is further provided with an electric leakage release, the electric leakage release is accommodated in the second cavity, the middle cover is provided with a fifth through hole, the fifth through hole and a copper column of the electric leakage release are arranged oppositely, and the copper column of the electric leakage release protrudes from the fifth through hole and is connected with the circuit board.

In this embodiment, the copper pillar of the electrical leakage release may be connected to the circuit board through the protrusion of the fifth through hole, so that the circuit board controls whether the electrical leakage release is released.

In an alternative form, the circuit board is fixed to the middle cover by screws.

In an alternative form, the circuit breaker is a molded case circuit breaker with a residual current protection function.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and in order that the technical means of the embodiments of the present application can be clearly understood, the embodiments of the present application are specifically described below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present application more clearly understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a circuit breaker provided in an embodiment of the present application after a face cover and a circuit board are removed.

Fig. 2 is a schematic structural diagram of the circuit breaker provided by the embodiment of the present application after a face cover is removed.

Fig. 3 is an exploded view of a circuit breaker according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a first surface of a base according to an embodiment of the present disclosure.

Fig. 5 is a schematic structural diagram of a second surface of a base according to an embodiment of the present application.

Description of the reference numerals:

01. a middle cover; 011. a first groove; 012. a second groove; 02. a face cover; 03. a circuit board; 05. a first voltage dependent resistor; 06. a voltage reduction resistor; 07. a second voltage dependent resistor; 08. a third voltage dependent resistor; 09. a base; 091. a first through hole; 092. a second through hole; 093. a wiring groove; 10. a connecting plate; 11. a third through hole; 12. a transformer; 13. a fourth via hole; 14. a second connector; 15. a copper post of the leakage release; 16. and (4) screws.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The terms "comprising" and "having," and any variations thereof, in the description and claims of this application and the description of the drawings are intended to cover, but not to exclude, other elements. The word "a" or "an" does not exclude a plurality.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The directional terms appearing in the following description are directions shown in the drawings and do not limit a specific structure of a circuit breaker of the present application. For example, in the description of the present application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated based on the orientation or positional relationship shown in the drawings for the convenience of description and simplicity of description only, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present application.

Furthermore, the terms "first," "second," and the like in the description and claims of the present application or in the above-described drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential order, and may explicitly or implicitly include one or more of the features.

In the description of the present application, unless otherwise specified, "plurality" means two or more (including two), and similarly, "plural groups" means two or more (including two).

In the description of the present application, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., "connected" or "connected" of a mechanical structure may refer to a physical connection, e.g., a physical connection may be a fixed connection, e.g., a fixed connection by a fastener, such as a screw, bolt, or other fastener; the physical connection can also be a detachable connection, such as a mutual clamping or clamping connection; the physical connection may also be an integral connection, for example, a connection made by welding, gluing or integrally forming the connection. "connected" or "coupling" of circuit structures may mean not only physical coupling but also electrical or signal coupling, for example, direct coupling, i.e., physical coupling, or indirect coupling via at least one element therebetween, as long as electrical communication is achieved, or communication between the two elements; signal connection may refer to signal connection through a medium, such as radio waves, in addition to signal connection through circuitry. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The embodiment of the application provides a circuit breaker, which is a molded case circuit breaker with a residual current protection function. The molded case circuit breaker with the residual current protection function is generally provided with an electric leakage release besides short circuit and overload so as to break the connection between a power supply circuit and a load when the load has electric leakage, thereby having the function of electric leakage protection.

In practical application, the circuit breaker provided by the embodiment further comprises a mutual inductor for detecting whether the three-phase current is balanced. For example, when the mutual inductor detects that three-phase current is unbalanced, namely leakage current exists, at the moment, the mutual inductor can transmit signals to a circuit board which is connected with the mutual inductor and integrated with a circuit used for controlling a leakage protection related circuit, and the circuit board controls a leakage release connected with the circuit board to release. In addition, in order to achieve the above functions, a circuit board integrated with a voltage dependent resistor and a voltage dropping resistor is generally required to be included in the circuit breaker, wherein the voltage dependent resistor is used for protecting the circuit, and the voltage dropping resistor is used for dividing the voltage of the electrical element in the circuit. However, these piezoresistors and step-down resistors have large volumes, and in the prior art, the circuit board integrated with the piezoresistors and the step-down resistors is mainly placed in the space between the middle cover and the base, and the circuit board integrated with the circuit related to control leakage protection is placed in the space between the middle cover and the front cover, so that the circuit board integrated with the circuit related to control leakage protection cannot be formed into an integrated circuit board.

In this embodiment, fig. 1 shows a schematic structural diagram of the circuit breaker provided by the embodiment of the present application after removing a face cover and a circuit board, and fig. 2 shows a schematic structural diagram of the circuit breaker provided by the embodiment of the present application after removing the face cover. Fig. 3 shows an explosion diagram of a circuit breaker provided in an embodiment of the present application.

As shown in fig. 1, 2 and 3, an embodiment of the present application provides a circuit breaker, including: middle lid 01, face lid 02 and circuit board 03. The middle cover 01 is provided with a first groove 011 and a second groove 012, and referring to fig. 1 and 2, the first groove 011 and the second groove 012 can both be square, and the depth of the second groove 012 is greater than that of the first groove 011. The surface cover 02 covers the middle cover 01, and a first cavity is formed between the surface cover 02 and the middle cover 01. The circuit board 03 holds in first cavity, and the one side of circuit board 03 orientation well lid 01 is equipped with first resistance module and second resistance module, and first resistance module crouches in first recess 011, and second resistance module stands on second recess 012.

In this embodiment, the first resistor module may be a first voltage dependent resistor 05 and a voltage dropping resistor 06, and the second resistor module may be a second voltage dependent resistor 07 and a third voltage dependent resistor 08. The circuit board comprises a first resistor module, a second resistor module, a first groove 011 and a second groove 012, wherein the first resistor module is arranged in the first groove 011 in a horizontal mode, the second resistor module is arranged in the second groove 012 in a vertical mode, the space of the first cavity can be fully utilized, a circuit board integrated with piezoresistor and step-down resistor is arranged in the first cavity, and a circuit board integrated with a related circuit for controlling leakage protection is also arranged in the first cavity.

In one embodiment, referring to fig. 3, the circuit breaker may further include a base 09 and a power take-out line, wherein the middle cover 01 covers the base 09, and a second cavity is formed between the middle cover 01 and the base 09. Fig. 4 shows a schematic structural diagram of a first surface of a base provided in an embodiment of the present application. Fig. 5 shows a schematic structural diagram of a second surface of a base provided in an embodiment of the present application. Referring to fig. 4 and 5, the base 09 is provided with a first through hole 091, a second through hole 092, and a wiring groove 093, hole axes of the first through hole 091 and the second through hole 092 are perpendicular to a first surface, which is a side surface of the base 09 facing the middle cap 01, and the wiring groove 093 is provided on a second surface, which is an opposite surface of the first surface. One end of the power taking wire is connected with the connecting plate 10 of the circuit breaker, and the other end of the power taking wire penetrates through the first through hole 091 from the second cavity, is led out from the second through hole 092 through the wiring groove 093, and then is connected with the circuit board 03 to supply power to the circuit board 03.

In practical application, the power line is a three-phase power line, and correspondingly, referring to fig. 4 and 5, there are 3 first through holes 091, and each phase power line correspondingly passes through one first through hole 091, is led out from the second through hole 092 through the wiring groove 093, and is connected with the circuit board 03 to supply power to the circuit board 03.

In this embodiment, the power-taking wire is led out from the second through hole 092 through the wire-routing groove 093 and then connected to the circuit board 03, so that the power-taking wire is accommodated in the wire-routing groove 093 and then led out from the second through hole 092 to be connected to the circuit board 03, and therefore the wiring in the circuit breaker can be neater, and the number of electrical elements near the wire-routing groove 093 is small, so that the interference of the power-taking wire on the electrical elements in the circuit breaker can be reduced through the wire-routing groove 093, and the reliability of the circuit is improved.

In the above embodiment, referring to fig. 1, after the wire is led out from the second through hole 092, the wire is further connected to the circuit board 03, in order to reduce the length of the wire and reduce the cost, a third through hole 11 may be disposed on the middle cover 01, and the third through hole 11 and the second through hole 092 are disposed opposite to each other, so that the wire can directly pass through the second through hole 092, the second cavity, and the third through hole 11 to be connected to the circuit board 03.

In one embodiment, referring to fig. 1, 2 and 4, the transformer 12 is disposed on the base 09, the transformer 12 is accommodated in the second cavity, the middle cover 01 is provided with a fourth through hole 13, a hole axis of the fourth through hole 13 is perpendicular to a third surface, the third surface is a side surface of the middle cover 01 facing the surface cover 02, the fourth through hole 13 is opposite to a signal output end of the transformer 12, and the signal output end is connected to the circuit board 03 through the fourth through hole 13.

In this embodiment, the middle cover 01 is provided with a fourth through hole 13 opposite to the signal output end of the transformer 12, so that the signal output end can be conveniently connected with the circuit board 03.

In the above embodiment, referring to fig. 2, the circuit breaker may comprise a first connector and the circuit board 03 is provided with a second connector 14. In particular, the signal output terminal may be connected to a first connector, which may be connected to a second connector 14 through a fourth through hole 13. For example, the first connector may be a male connector and the second connector 14 may be a female connector.

In one embodiment, considering that the space between the circuit board 03 and the middle cover 01 may not be enough to dispose the second connector 14, the second connector 14 may be disposed on a side surface of the circuit board 03 adjacent to the face cover 02 to facilitate the connection of the first connector and the second connector 14.

In practical applications, the circuit board 03 is also required to be connected to the leakage release to control the leakage release. In one embodiment, the leakage release is disposed on the base 09, the leakage release is accommodated in the second cavity, and referring to fig. 1, the middle cover 01 is provided with a fifth through hole, the fifth through hole is disposed opposite to the copper pillar 15 of the leakage release, and the copper pillar 15 of the leakage release protrudes from the fifth through hole and is connected to the circuit board 03, so that the circuit board 03 can control whether the leakage release is released.

In one embodiment, referring to fig. 2, the wiring board 03 may be fixed to the middle cap 01 by screws 16. The circuit board 03 can also comprise a chip, a thyristor, a test loop and the like. For example, the chip may be a single chip microcomputer, the test loop may be used to simulate a leakage current state of the circuit breaker to control the action of the leakage release, the thyristor may be used as a switch to turn off the thyristor, and the circuit board 03 may supply power to a coil of the leakage release to trip the leakage release. The remaining electrical components on the circuit board 03 provided in this embodiment can be compactly arranged on the front side and the back side of the circuit board 03 respectively by using the remaining space, so that the problems of placement layout, wiring manner, electrical safety spacing, and the like of the whole circuit are solved.

Those of skill in the art will understand that while some embodiments herein include certain features included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (9)

1. A circuit breaker, characterized in that the circuit breaker comprises: the middle cover, the face cover and the circuit board;

the middle cover is provided with a first groove and a second groove, and the depth of the second groove is greater than that of the first groove;

the surface cover covers the middle cover, and a first cavity is formed between the surface cover and the middle cover;

the circuit board is accommodated in the first cavity, one side of the circuit board, which faces the middle cover, is provided with a first resistance module and a second resistance module, the first resistance module is horizontally arranged in the first groove, and the second resistance module is vertically arranged in the second groove.

2. The circuit breaker of claim 1, further comprising a base and a power take-off wire, wherein the middle cover covers the base, and a second cavity is formed between the middle cover and the base;

the base is provided with a first through hole, a second through hole and a wiring groove, the axes of the first through hole and the second through hole are perpendicular to a first surface, the first surface is the surface of one side, facing the middle cover, of the base, the wiring groove is formed in a second surface, and the second surface is the reverse side of the first surface;

one end of the wire taking device is connected with the connecting plate of the circuit breaker, and the other end of the wire taking device penetrates through the second cavity, passes through the first through hole, is led out from the second through hole through the wiring groove, and then is connected with the circuit board.

3. The circuit breaker according to claim 2, wherein the middle cover is provided with a third through hole, the third through hole and the second through hole are oppositely arranged, and the power taking line is led out from the second through hole, penetrates through the second cavity and the third through hole, and is connected with the circuit board.

4. The circuit breaker according to claim 2, wherein a transformer is further disposed on the base, the transformer is accommodated in the second cavity, the middle cover is provided with a fourth through hole, a hole axis of the fourth through hole is perpendicular to a third surface, the third surface is a side surface of the middle cover facing the face cover, the fourth through hole is opposite to a signal output end of the transformer, and the signal output end is connected to the circuit board through the fourth through hole.

5. The circuit breaker of claim 4, wherein said circuit breaker includes a first connector, said circuit board having a second connector, said signal output terminal being connected to said first connector, said first connector being connected to said second connector through said fourth through hole.

6. The circuit breaker of claim 5, wherein the second connector is disposed on a side surface of the circuit board adjacent to the face cover to facilitate connection between the first connector and the second connector.

7. The circuit breaker of claim 2, wherein the base further comprises an electrical leakage release, the electrical leakage release is accommodated in the second cavity, the middle cover is provided with a fifth through hole, the fifth through hole is opposite to the copper pillar of the electrical leakage release, and the copper pillar of the electrical leakage release protrudes from the fifth through hole and is connected to the circuit board.

8. The circuit breaker of claim 1, wherein the circuit board is secured to the middle cap by screws.

9. The circuit breaker of claim 1, wherein the circuit breaker is a molded case circuit breaker with residual current protection.

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